Sigma Software Group

Senior Front-End Developer

Sigma Software Group

full-time

Posted on:

Location Type: Remote

Location: Poland

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Job Level

Senior

Tech Stack

GraphQLJavaScriptNode.jsReact

About the role

  • Build responsive, user-friendly UI using React
  • Develop charts and interactive data visualizations based on existing datasets
  • Integrate backend data into frontend applications via REST/GraphQL APIs
  • Collaborate closely with data engineers to ensure seamless data integration
  • Optimize application performance, scalability, and reliability
  • Implement security best practices, CI/CD workflows, automated testing, and code quality standards
  • Work with product and design teams to translate business requirements into technical solutions
  • Take ownership of features from ideation to deployment and monitoring in production
  • Stay up to date with emerging technologies and contribute to technical decision-making within the team

Requirements

  • 5+ years of professional experience with JavaScript, including modern frameworks and tools
  • Strong experience with React for designing maintainable, scalable UI systems
  • Experience working with APIs (REST/GraphQL)
  • Basic understanding of backend concepts (e.g., Node.js)
  • Strong knowledge of frontend fundamentals (HTML, CSS)
  • Upper-Intermediate level of spoken and written English
  • WILL BE A PLUS: Experience with Model Context Protocol (MCP)
  • Familiarity with workflow automation tools such as n8n
Benefits
  • Flexible work arrangements
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
JavaScriptReactREST APIsGraphQLHTMLCSSNode.jsCI/CDautomated testingcode quality standards
Soft Skills
collaborationownershipcommunicationtechnical decision-making